Vittorio Emanuele 4-4-0 Locomotives in Italy
Class Details by Steve Llanso of Sweat House Media
Class 256/389 (Locobase 20627)
Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T36. Works numbers were 346-354 in 1853 and 512-514 in 1860. (For roster details, see Josef Pospichal's lokstatistic website at [
], last accessed 14 August 2019.
These early Eight-wheelers put 3/4 of their weight on the two driven axles while carrying the inclined external cylinders, dome, smokebox on bogie with closely spaced axles. Their small drivers suggested mountain railroading.
All twelve were taken into the FS d' Alta Italia in 1865 and appeared on Rete Mediterraneo's roster in 1885. Half received the Ferro dello Stato's
The Album data show the fireside evaporative heating surface area--71.5-- sq m, which was approximately 17% too low when compared to the sum of firebox heating surface area and the calculated tube heating surface area including the tubes' external (water side) diameter.. Locobase's specifications adjust the EHS to reflect the higher value.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 256/389 |
| Locobase ID | 20627 |
| Railroad | Vittorio Emanuele |
| Country | Italy |
| Whyte | 4-4-0 |
| Number in Class | 12 |
| Road Numbers | 256-264, 119-121/389-400/2001-2012/4991-4996 |
| Gauge | Std |
| Number Built | 12 |
| Builder | Cockerill |
| Year | 1853 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 4.94 / 1.50 |
| Engine Wheelbase (ft / m) | 12.14 / 3.70 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.41 |
| Overall Wheelbase (engine & tender) (ft / m) | 34.83 / 10.62 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 22,928 / 10,400 |
| Weight on Drivers (lbs / kg) | 46,297 / 21,000 |
| Engine Weight (lbs / kg) | 59,525 / 27,000 |
| Tender Loaded Weight (lbs / kg) | 39,683 / 18,000 |
| Total Engine and Tender Weight (lbs / kg) | 99,208 / 45,000 |
| Tender Water Capacity (gals / ML) | 1584 / 6 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.80 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 39 / 19.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 49.80 / 1265 |
| Boiler Pressure (psi / kPa) | 101.50 / 700 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.98" x 24.02" / 406x610 |
| Tractive Effort (lbs / kg) | 10,626 / 4819.88 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.36 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 136 - 1.969" / 50 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.27 / 3.74 |
| Firebox Area (sq ft / m2) | 67.28 / 6.25 |
| Grate Area (sq ft / m2) | 10.76 / 1 |
| Evaporative Heating Surface (sq ft / m2) | 927 / 86.10 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 927 / 86.10 |
| Evaporative Heating Surface/Cylinder Volume | 166.26 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1092 |
| Same as above plus superheater percentage | 1092 |
| Same as above but substitute firebox area for grate area | 6829 |
| Power L1 | 1909 |
| Power MT | 181.81 |